[Orgmode] Beamer export questions/suggestions

[Derek Thomas]

Before I get to my questions, I would like to commend all those
involved in the development of org-mode.  I'm a new user and I've been
amazed by the features, utility, and the support/documentation
provided.

My first question relates to frames in beamer export.  Is it possible
to set a tag or otherwise indicate that a frame should appear without
a title, or as an empty frame (no header or footer)?  My second
question may be more of a suggestion if the feature is not available.
I currently use the testpos package in latex to position my figures in
beamer.  Is there a native org method to specify figure location in
org-beamer?  If not, it could be a nice feature for those preparing
presentations in org especially if it had the option to specify
quadrant location and relative size in a simple manner.  Thanks again,

Derek